Hi Chuck,

I did articles for the Club's magazine about 8 years ago including shapes:

Henagon - 1 side (circle)

Diagon - 2 sides (pointed oval)

Technically polygons do not have curved sides.

Trigon - 3 sides

Tetragon - 4 sides

Pentagon - 5 sides

I could not find a casino chips with 5 sides

Hexagon - 6 sides

This is a Faro "copper"

Heptagon - 7 sides

I could not find a casino chips with 7 sides

Octagon - 8 sides

Nonagon - 9 sides

I could not find any object with 9 sides

Decagon - 10 sides

Hendecagon - 11 sides

I could not find a casino chips with 11 sides

Dodecagon - 12 sides